MS3126F18-11S is a miniature cylindrical straight plug connector designed for environmental-resistant applications with strain relief capability. This connector features bayonet coupling with crimp contacts and meets MIL-C-26482 Series 1 specifications. It has a shell size 18 with insert arrangement 18-11, providing 11 contacts of size 16, and is rated for Service Class II. The connector offers multiple insert rotation options (W: 62°, X: 119°, Y: 241°, Z: 340°) for keying flexibility. Common applications include military, aerospace, and industrial equipment where reliable, environmentally sealed connections with strain relief are required.